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Search Results: 1 - 9 of 9 matches for " Hidezumi Terazawa "
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Composite Higgs Boson in the Unified Subquark Model of All Fundamental Particles and Forces  [PDF]
Hidezumi Terazawa, Masaki Yasuè
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.55031

In the unified subquark model of all fundamental particles and forces, the mass of the Higgs boson in the standard model of electroweak interactions (mH) is predicted to be about \"\" (where mw is the mass of the charged weak boson), which agrees well with the experimental values of 125 - 126 GeV recently found by the ATLAS and CMS Collaborations at the LHC. It seems to indicate that the Higgs boson is a composite of the iso-doublet subquark-antisubquark pairs well described by the unified subquark model with either one of subquark masses vanishing or being very small compared to the other.

Masses of Fundamental Particles
Hidezumi Terazawa
Physics , 2011,
Abstract: In the original paper entitled, "Masses of Fundamental Particles"(arXiv:1109.3705v5, 10 Feb 2012), not only the masses of fundamental particles including the weak bosons, Higgs boson, quarks, and leptons, but also the mixing angles of quarks and those of neutrinos are all explained and/or predicted in the unified composite models of quarks and leptons successfully. In this addendum entitled, "Higgs Boson Mass in the Minimal Unified Subquark Model", it is emphasized that the Higgs boson mass is predicted to be about 130Gev in the minimal unified subquark model, which agrees well with the experimental values of 125-126GeV recently found by the ATLAS and CMS Collaborations at the LHC.
Environment-Dependent Fundamental Physical Constants in the Theory of General Inconstancy
Hidezumi Terazawa
Physics , 2012,
Abstract: A theory of special inconstancy, in which some fundamental physical constants such as the fine-structure and gravitational constants may vary, is proposed in pregeometry. In the special theory of inconstancy, the \alpha-G relation of \alpha=3\pi/[16ln(4\pi/5GM_W^2)] between the varying fine-structure and gravitaional constants (where M_W is the charged weak boson mass) is derived from the hypothesis that both of these constants are related to the same fundamental length scale in nature. Furthermore, it leads to the prediction of dot{{\alpha}}/\alpha=(-0.8\pm2.5)\times10^{-14}yr^{-1} from the most precise limit of dot{G}/G=(-0.6\pm2.0)\times10^{-12}yr^{-1} by Thorsett, which is not only consistent with the recent observation of dot{{\alpha}}/\alpha=(0.5\pm0.5)\times10^{-14}yr^{-1} by Webb et al. but also feasible for future experimental tests. Also a theory of general inconstancy, in which any fundamental physical constants may vary, is proposed in "more general relativity", by assuming that the space-time is "environment-dependent". In the general theory of inconstancy, the G-\Lambda\ relation between the varying gravitational and cosmological constants is derived from the hypothesis that the space-time metric is a function of \tau, the "environment-coodinate", in addition to x^{\mu}, the ordinary space-time coodinates. Furthermore, it leads to the prediction of the varying cosmological constant, which is consistent with the present observations. In addition, the latest observation of spatial variation in the fine-structure constant from VLT/UVES of (1.1\pm 0.2)\times 10^{-6}GLyr^{-1} by King et al. is suggested to be taken as a clear evidence for environment-dependent fundamental physical constants
Exotic Matter and Space-Time
Hidezumi Terazawa
Physics , 2013,
Abstract: Exotic forms of matter such as carbon nanofoams, hexalambdas, super-hypernuclei, strange stars, pentaquarks, color-balls, etc. and their relations to current problems in cosmo-particle physics such as dark matter and energy are discussed in some details. This is an extended version of the invited talk presented at the International Conference on New Trends in High-Energy Physics , Yalta, Crimea(Ukraine), September 10-17, 2005, which has been published in the Proceedings, edited by P.N.Bogolyubov, P.O.Fedosenko, L.L.Jenkovszky, and Yu.A.Karpenko(Bogolyubov Institute for Theoretical Physics, Kiev, 2005). In an extended and up-dated version of the Chapters I and III, entitled "Exotic Nuclei and Strange Stars", which has been published in Nonlinear Phenomena in Complex Systems 18(2015)25-30, new forms of matter such as exotic nuclei and strange stars are discussed in some detail.
Has the Substructure of Quarks Been Found by the Collider Detector at Fermilab?
Keiichi Akama,Hidezumi Terazawa
Physics , 1996, DOI: 10.1103/PhysRevD.55.2521
Abstract: The significant excess recently found by the CDF Collaboration in the inclusive jet cross section for jet transverse energies $E_T \ge 200$ GeV over current QCD predictions can be explained either by possible production of excited bosons (excited gluons, weak bosons, Higgs scalars, etc.) or by that of excited quarks. The masses of the excited boson and the excited quark are estimated to be around 1600 GeV and 500 GeV, respectively.
Has the Substructure of Quarks and Leptons Been Found also by the H1 and ZEUS Detectors at HERA?
Keiichi Akama,Kazuo Katsuura,Hidezumi Terazawa
Physics , 1997, DOI: 10.1103/PhysRevD.56.R2490
Abstract: The significant excess of events recently found by the H1 and ZEUS Collaborations at HERA in the deep-inelastic e^+ p scattering for high momentum-transfers squared Q^2>15000 GeV^2 over the expectation of the standard model can be explained by either one of the following possible consequences of the substructure of quarks and leptons: 1) production of leptoquarks (Phi), 2) exchange of an excited Z boson (Z'), 3) intrinsic form factors of quarks (or leptons), 4) intrinsic anomalous magnetic moments of quarks, 5) production of excited quarks (q^*), and 6) that of excited positrons (e^*+). The masses of these new particles are estimated to be m(Phi) = 280-440 GeV, m(Z') = 210-250 GeV, m(q^*) = 120-140 GeV, and m(e^*+) = 300-370 GeV, although the possibilities 2) and 5) are excluded by the currently available experimental constraints.
Interplay between quantum criticality and geometrical frustration in Fe3Mo3N with stella quadrangula lattice
Takeshi Waki,Shinsuke Terazawa,Teruo Yamazaki,Yoshikazu Tabta,Keisuke Sato,Akihiro Kondo,Koichi Kindo,Makoto Yokoyama,Yoshinori Takahashi,Hiroyuki Nakamura
Physics , 2010, DOI: 10.1209/0295-5075/94/37004
Abstract: In the eta-carbide-type correlated-electron metal Fe3Mo3N, ferromagnetism is abruptly induced from a nonmagnetic non-Fermi-liquid ground state either when a magnetic field (~14 T) applied to it or when it is doped with a slight amount of impurity (~5% Co). We observed a peak in the paramagnetic neutron scattering intensity at finite wave vectors, revealing the presence of the antiferromagnetic (AF) correlation hidden in the magnetic measurements. It causes a new type of geometrical frustration in the stellla quadrangula lattice of the Fe sublattice. We propose that the frustrated AF correlation suppresses the F correlation to its marginal point and is therfore responsible for the origin of the ferromagnetic (F) quantum critical behavior in pure Fe3Mo3N.
Thermal conductivity of quantum magnetic monopoles in the frustrated pyrochlore Yb2Ti2O7
Y. Tokiwa,T. Yamashita,M. Udagawa,S. Kittaka,T. Sakakibara,D. Terazawa,Y. Shimoyama,T. Terashima,Y. Yasui,T. Shibauchi,Y. Matsuda
Physics , 2015,
Abstract: We report low-temperature thermal conductivity $\kappa$ of pyrochlore Yb$_2$Ti$_2$O$_7$, which contains frustrated spin-ice correlations with significant quantum fluctuations. In the disordered spin-liquid regime, $\kappa(H)$ exhibits a nonmonotonic magnetic field dependence, which is well explained by the strong spin-phonon scattering and quantum monopole excitations. We show that the excitation energy of quantum monopoles is strongly suppressed from that of dispersionless classical monopoles. Moreover, in stark contrast to the diffusive classical monopoles, the quantum monopoles have a very long mean free path. We infer that the quantum monopole is a novel heavy particle, presumably boson, which is highly mobile in a three-dimensional spin liquid.
The CALET Gamma-ray Burst Monitor (CGBM)
Kazutaka Yamaoka,Atsumasa Yoshida,Takanori Sakamoto,Ichiro Takahashi,Takumi Hara,Tatsuma Yamamoto,Yuta Kawakubo,Ry ota Inoue,Shunsuke Terazawa,Rie Fujioka,Kazumasa Senuma,Satoshi Nakahira,Hiroshi Tomida,Shiro Ueno,Shoji Torii,Michael L. Cherry,Sergio Ricciarini,the CALET collaboration
Physics , 2013,
Abstract: The CALET Gamma-ray Burst Monitor (CGBM) is the secondary scientific instrument of the CALET mission on the International Space Station (ISS), which is scheduled for launch by H-IIB/HTV in 2014. The CGBM provides a broadband energy coverage from 7 keV to 20 MeV, and simultaneous observations with the primary instrument Calorimeter (CAL) in the GeV - TeV gamma-ray range and Advanced Star Camera (ASC) in the optical for gamma-ray bursts (GRBs) and other X-gamma-ray transients. The CGBM consists of two kinds of scintillators: two LaBr$_3$(Ce) (7 keV - 1 MeV) and one BGO (100 keV - 20 MeV) each read by a single photomultiplier. The LaBr$_3$(Ce) crystal, used in space for the first time here for celestial gamma-ray observations, enables GRB observations over a broad energy range from low energy X-ray emissions to gamma rays. The detector performance and structures have been verified using the bread-board model (BBM) via vibration and thermal vacuum tests. The CALET is currently in the development phase of the proto-flight model (PFM) and the pre-flight calibration of the CGBM is planned for August 2013. In this paper, we report on the current status and expected performance of CALET for GRB observations.
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